CMXT3946 TR PBFREE

Overview

The CMXT3946 TR PBFREE is a dual complementary silicon transistor manufactured by Central Semiconductor Corp using an epitaxial planar process. It integrates one NPN and one PNP transistor in a surface-mount SOT-26 package. The device supports continuous collector currents up to 200 mA with power dissipation rated at 350 mW. Maximum ratings include 40 V collector-emitter voltage for both polarities, 60 V collector-base voltage for the NPN, and 60 V emitter-base voltage for the NPN. Transition frequencies reach 300 MHz for the NPN and 250 MHz for the PNP. DC current gain ranges from 100 to 300 at 10 mA collector current.

Feature Summary

• Dual complementary configuration integrating NPN and PNP transistors in a single surface-mount package
• Designed for small signal general purpose and switching applications
• Epitaxial planar manufacturing process ensures stable electrical characteristics

Applications

• Small signal amplification circuits
• General purpose switching applications
• Complementary push-pull output stages

Procurement Notes

Verify that the ordering suffix matches the required plating specification. The PBFREE designation indicates lead-free plating compliance. Confirm the package type corresponds to the SOT-26 outline provided in the datasheet. Ensure the manufacturer identification aligns with Central Semiconductor Corp documentation. Cross-reference the marking code X46 for physical unit verification.

Selection Notes

Select this component when a matched NPN/PNP pair is required in a compact surface-mount footprint. Evaluate the 350 mW power dissipation limit against thermal constraints in the target application. Consider the transition frequency specifications for high-speed switching requirements. Verify that the 40 V collector-emitter breakdown voltage meets the circuit operating conditions.

Part Context

This part belongs to the CMXT series of surface mount dual complementary silicon transistors produced by Central Semiconductor Corp. The series utilizes an epitaxial planar process for consistent performance. The CMXT3946 specifically targets general-purpose and switching roles within a compact SOT-26 package format.

Replacement Considerations

Cross-reference with PMBT3946YPN,125 from Nexperia or MMDT3946-13 from Diodes Inc. for similar dual complementary BJT configurations. Verify pinout compatibility and electrical parameter alignment before substitution.